[tip:perf/core] perf tools: Unset perf_event_attr:: freq when period term is set
From: tip-bot for Jiri Olsa
Date: Wed Aug 12 2015 - 08:30:18 EST
Commit-ID: ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Gitweb: http://git.kernel.org/tip/ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Author: Jiri Olsa <jolsa@xxxxxxxxxx>
AuthorDate: Sat, 8 Aug 2015 19:12:10 +0200
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Mon, 10 Aug 2015 11:58:05 -0300
perf tools: Unset perf_event_attr::freq when period term is set
We need to unset 'perf_event_attr::freq' bit (default 1) when
'period' term is specified within event definition like:
-e 'cpu/cpu-cycles,call-graph=fp,time,period=100000'
otherwise it will handle the period value as frequency
(and fail if it crossed the maximum allowed frequency value).
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Kan Liang <kan.liang@xxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20150808171210.GC17040@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/evsel.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f572f46..a59710f 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -598,6 +598,7 @@ static void apply_config_terms(struct perf_evsel *evsel)
switch (term->type) {
case PERF_EVSEL__CONFIG_TERM_PERIOD:
attr->sample_period = term->val.period;
+ attr->freq = 0;
break;
case PERF_EVSEL__CONFIG_TERM_TIME:
if (term->val.time)
--
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